2015
DOI: 10.1103/physrevb.92.165310
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Quantitative analysis of electrically detected Ramsey fringes in P-doped Si

Abstract: This work describes detection of the laser preparation and subsequent coherent manipulation of the quantum states of orbital levels of donors in doped Si, by measuring the voltage drop across an irradiated Si sample. This electrical signal, which arises from thermal ionization of excited orbital states, and which is detected on a millisecond time scale by a voltmeter, leads to much more sensitive detection than can be had using optical methods, but has not before been quantitatively described from first princi… Show more

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Cited by 4 publications
(6 citation statements)
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“…We summarize the results for this work and others in Table I. In the case where the signal is proportional to either the excited-state population produced by a coherent Ramsey pair as in the previous electrical detection experiments [8,12], or to the ground-state population as in the present case of crossed-polarized probe transmission detection, τ Table I the measured time-bandwidth product deviates by 2σ or less from the expected value; i.e., it is therefore largely consistent with zero difference between observation and expectation. The agreement may be slightly improved in the two previous work cases (2 and 3 in Table I) by taking into account the convolution with the finite laser pulse.…”
Section: Discussionmentioning
confidence: 86%
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“…We summarize the results for this work and others in Table I. In the case where the signal is proportional to either the excited-state population produced by a coherent Ramsey pair as in the previous electrical detection experiments [8,12], or to the ground-state population as in the present case of crossed-polarized probe transmission detection, τ Table I the measured time-bandwidth product deviates by 2σ or less from the expected value; i.e., it is therefore largely consistent with zero difference between observation and expectation. The agreement may be slightly improved in the two previous work cases (2 and 3 in Table I) by taking into account the convolution with the finite laser pulse.…”
Section: Discussionmentioning
confidence: 86%
“…THz-pumped orbital excitations of silicon impurities have been controlled and detected both incoherently and coherently to provide various dynamical time scales T 1 [1,8,9] (including the ionized donor recombination rate [10] and the interdonor tunneling rate [11]), T 2 [7], and T * 2 [8,12]. The Bloch sphere simply maps the population (given by the longitudinal, z component of the Bloch vector) and polarization (given by the transverse, x-y component).…”
Section: Introductionmentioning
confidence: 99%
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“…The first is that of accessing new excited states with different symmetry, e.g. the isotropic 2s rather than the axial 2p states used previously 28,38,39,40,41 . The second is that of moving from the Rydberg energies of order 10THz, difficult to reach for non-FEL sources, towards the region near a few THz, which is where certain QCL's 42 as well as mixing crystals 43 produce significant radiation.…”
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confidence: 99%